Hollow Waveguide Gas Sensor for Mid-Infrared Trace Gas Analysis

Conference · Thu Jul 12 04:00:00 EDT 2007

DOI:https://doi.org/10.1109/ICSENS.2007.4388640· OSTI ID:920855

Kim, S; Young, C; Chan, J; Carter, C; Mizaikoff, B

A hollow waveguide mid-infrared gas sensor operating from 1000 cm{sup -1} to 4000 cm{sup -1} has been developed, optimized, and its performance characterized by combining a FT-IR spectrometer with Ag/Ag-halide hollow core optical fibers. The hollow core waveguide simultaneously serves as a light guide and miniature gas cell. CH{sub 4} was used as test analyte during exponential dilution experiments for accurate determination of the achievable limit of detection (LOD). It is shown that the optimized integration of an optical gas sensor module with FT-IR spectroscopy provides trace sensitivity at the few hundreds of parts-per-billion concentration range (ppb, v/v) for CH{sub 4}.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 920855
• Report Number(s): UCRL-PROC-233227
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
42 ENGINEERING
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DETECTION
DILUTION
GAS ANALYSIS
OPTICAL FIBERS
PERFORMANCE
SENSITIVITY
SPECTROMETERS
SPECTROSCOPY
WAVEGUIDES